S. Mahunka szerk.: Folia Entomologica Hungarica 28/1. (Budapest, 1975)
basic stock. We, however, do not want to entirely reject the possibility of mass production, therefore, a sketch is given in Fig. 4 how a basic stock of flies may be maintained in a small-scale agricultural plant. Eggs obtained thereby could be continuously provided and the larvae after hat ching would be reared on pig manure collected from large-scale agricultural concerns in order to produce great masses of house fly larvae . Fig. 4: Breeding method for house fly under the conditions of a small-scale agricultural concern. A: The keeping of imagines in order to obtain eggs; B: the rearing of the breeding stock (1: electric bulb, 2: the feeding of adults in a trap-like drawer system, 3: the keeping of pupae to replace the breeding stock, 4: the removal of dead imagines, 5:collecting the eggs with a known quantity of physiological saline, 6: fresh pig manure, 7: sawdust) Some preliminary examinations have been carried out to process pig manure deriving from large-scale agricultural concerns to obtain fly larvae as feedstuff of high protein content. Alongside we obtained some theoretical ecological data. Our experiments gave a maximum of 8.05 % production yield, which seem to prove that it is quite unlikelythat more than 10 % production yield is surpassed. The particle size of pig manure is of such a composition that at most only 40 % of the total dry weight may be taken up by larvae; they in fact consume this quantity together with a part of their own discharge. The maximally charged pig manure with fly larvae showed a decrease in dry weight not more than three times the total dry weight of the produced fly larvae. Examining the weight conditions of the various developmental phases it is apparently more economic to obtain larvae as final product than pupae .
